package book.test02;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

public class CountMapper extends Mapper<LongWritable, Text, Text, IntWritable> {
    Text k = new Text();
    IntWritable v = new IntWritable(1);

    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        //分割每一行
        String[] data = value.toString().split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
        //将城市和年限作为k
        k.set(data[5] + "," + data[4]);
        context.write(k, v);
    }
}
